EVERYDAY SCIENCE

Detailed explanation-1: -Answer: Digits in the measurement are significant figures are ‘6’ and ‘7’.

Detailed explanation-2: -The significant figures of a measured quantity are defined as all the digits known with certainty (those indicated by the markings on the measuring device) and the first uncertain, or estimated, digit (one digit past the smallest marking on the measuring device).

Detailed explanation-3: -All the zeros that are on the right of the last non-zero digit, after the decimal point, are significant. For example, 0.0079800 contains five significant digits. All the zeros that are on the right of the last non-zero digit are significant if they come from a measurement.

Detailed explanation-4: -Determining the Number of Significant Figures The number of significant figures in a measurement, such as 2.531, is equal to the number of digits that are known with some degree of confidence (2, 5, and 3) plus the last digit (1), which is an estimate or approximation.

Detailed explanation-5: -Introducing Significant Figures Clearly only the digits 1 and 6 are the actual measured values. Therefore we have only 2 significant figures. Zeros used as placeholders are not significant. This would include all of the zeros in 0.0016 m.